Observation and study of the J/ψ \to μ+μ- in the ATLAS experiment at LHC

Details Observation and study of the J/ψ \to μ+μ- in the ATLAS experiment at LHC Observation and study of the J/ψ \to μ+μ- in the ATLAS experiment at LHC

2010-10-15

arxiv.org/abs/1010.3123v1

Physics

High Energy Physics

High Energy Physics - Experiment

3 pages, 2 figures, HCP2010

Scientific paper

The high cross section for the J/{\psi} production and the wide transverse momentum spectrum accessible to ATLAS give to these events a central role in the calibration of the ATLAS detector. The data collected during the first months of the 2010 run at {\sqroot}s = 7 TeV p-p collisions (integrated Luminosity up to 290 nb-1) show a clear signal with two muons in the final state. The reconstructed invariant mass agrees with the PDG value and the peak width is compatible with Monte Carlo expectations. The doubly differential cross section is measured with respect to the transverse momentum and rapidity.

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